Description:Sturdy material: 3-d printer timing pulley is product of aluminum alloy, which is not smooth to wear, durable, and lengthy lasting. Replacement parts: The timing wheel can be utilized for taking place the 3D printer worn pulley, to assist upgrade the performance.Professional design: The width of synchronous wheel is 10mm/0.39 inch, and the inner gap is approx. 5mm/0.31 inch. Easy to use: The three-D printer timing wheel is awfully straight forward and convenient to operate, which is very handy to insytall.Good performance: The 3-D printer timing wheel is excessive speed, which is excessive voltage resistance, and is very useful.Specification:Material: Aluminum alloy.Size: Inner hole: approx. 5mm/0.31 inch.Width: approx. 10mm/0.39 inch.Note:There is probably a piece shade distortions due to different pc resolutions.There might be a slight errors thanks to diversified hand measurement.Package Includes:1 Piece Timing Pulley.